Wrench



l.l A. JOHNSON.

wnENcH.

APPLICATION FILED MMI. 23| I92I.

Patented Apr. 18, 1922.

2 SHEETS-SHEET I.

l@ NN.

LAQJOHNSON.

WRENCH.

APPIIATION FILED MAR. 23.1921.

v Patented Apr. 18

2 suns-SHEET 2.

Wl /VESSES A TTHNEYS tiras stairs WRENCH.

Specification of Letters Patent. i Patented Apr. 18, 1922.

Application filed March 23, 1921. Serial No. 454,617.

To all whom 2? may concern:

Be it known that I, .J oHN ARTHUR JOHN- soN, a citizenof the UnitedStates, and a resident of Leavenworth, in the county of Leavenworth andState of Kansas,have invented certainv new andv useful Improvements inWrenches, of which the following is a specification. 1

My invention relates to improvements in wrenches and has for its objectto provide an improved wrenchwhich is of simple and durableconstruction, reliable yin operation andV easy and inexpensive tomanufacture, which may be easily and readily adjusted and which isadapted-to eXert a powerful gripping action upon the work.

Another objectv isl to provide an improved wrench of this characterwhich inassembly presents a substantially unitary structure and whichmay be easily dissembled for purposes of replacement or repair. f

Other objects and advantages reside in` certainV novel features of theconstruction,

arrangement land combination of parts which will be hereinafter morefully described and particularly pointed out in the appended claims,reference being had to the accompanying drawings, forming a part of thisspecification, in which v Figure 1 is a side elevational view of thewrench embodying the invention,-

Figure 2 is a View in transverse vertical section, f Y Figure 3 is afront elevational view, Figure 4 isa transverse sectional view on theline 4-4 of Figure 1,

Figure 5 isa sectional view on the line 5-5 of Figure 1, and

Figure 6 -is a detail perspective Yview of the removable plate. Y l

Referring to the drawings wherein, for the sake of illustration, isshown the preferred embodiment of the invention, the numeral 10designates the body portion of the wrench. An outer jaw 11 is carried'by the body portion at one Aend thereof and a tubularshank 12 iscarried by the other end thereof. lllhe body portionis provided with anopening 13; which is alined with the opening of thetubularshankand whichis preferably polygonal for a purpose which will hereinafter more fullyappear.

An inner jaw 14 is operatively associated with the outer jaw. The innerand outer jaws constitute the coacting jaws of the wrench. Theinner ashank designated generally at 15 and slidably arranged in the opening 13of the body portion. The shank comprises sections 16 and 17 bothof'whioh are of general polygonal cross section whereby the shank isconstrained to rectilinear movement through the opening ofthe bodyportion. As shown in Figure 2, the section 17 is'provided with an axialopening or bore 17 which extends entirely therethrough. The section 16is provided with a reduced extension ll1 and the section 17 isvprovidedwith a complementary reduced extension 17a. rihese reduced extensionsare provided with comple,- mentary recesses'l'and 17b respectively.

A removable plate l18 normally closes an elongated opening '10?'provided inthe front face of the 1body portion, the plate being securedin position by means of screwsl 19 or the like. 4l/Vhen the plate 18 isremoved 'and the jaws of the wrench are closed as shown in Figure 2',the inner jaw 16 may be removed together with the section 16 of theshank thereof, Vtheopening 13a being of suffi'- cient extent `to permitthis operation.

Operating means for the coacting jaws is provided and includes atravelling screw 20 preferably hollow and havingits threads operativelyengaged with internal threads 21 provided on the inner wall of thetubular shank 12, rllheseinternal threads 21 thus constitute a threadedbearing for the travelling screw. A spindle 22 is carried by thetravelling screw and-is arranged in the opening17c Aofthe shanksection'17. A head 23 is rotatably arranged in the recess defined bythecomplementary recesses 1Gb and 17b and is connected tofthey spindlev22 by means of a neck 24'suitably secured to the head and to thespindle. The spindle,'neck and head, together with the Vcomplementaryrecesses of the reduced' extensions thus constitute common means fortransmitting the linear motion of the screw to the inner jaw forcoupling the sections of the shank to each other. In this manner thektravelling screw has a swivelled' connection to the shank of the innerjaw.

A thimble is rotatably arranged on an enlarged extension 12:L providedon the tubular shank 12 and its outer periphery is milled as shown inthe drawings to facilitate gripping. The adjacent periphery of thetubular shank is also milled. Means is provided for connecting thethimble to the travelling screw and includes a headed screw 26 'engagedin a threaded opening provided in an extension 2Oa of the travellingscrew and in an alined threaded opening provided in the thimble. rlhehead of the screw 26 arranged within the wrenchand the outer end of itsshank is provided with a diametrical slot 26L whereby it may be operatedupon by a screw driver or similar tool. The extension 2Oa is providedwith a longitudinal-slot 2Gb which extends from the outer end thereof tothe threaded opening and it is also 'provided with a pair of bosses 2()cstruck from the material of the extension. The extension 2Oa alsopresents an annular shoulder 20*1 which engages the outer end of Ywrench.

the tubular shank 12 to limit the inward movement of thetravellingscrew.

In assembling the wrench the section 17 of the shank of the inner jaw'ismounted on he spindle 22 and the travelling screw is then inserted inthe tubular shank, engaged with its threadedbearing and turned until theinner section of the shank and the head and neck are alined with theVopening 10mv of the body portion. The plate 18 is, of course,

not in position at this time and the outerA section 16 of the shank `15and its inner jaw 14 are then slid into position. By thisv operation thesections of the shank 15 are coupled together as the head 23 is nowconfined in the recess defined by the complementary recesses ofthe'sections. The only manner in which this coupling may be broken downis by a lateral displacement of the section 16' and this is precluded bysecuringvthe plate 18 in position by means of its screws 19.Y Thethimble is next positioned on the This is accomplished by firstthreading the screw 26 into its opening from the interior of theextension 20a, then 'sliding the thimble onto the extension 20 andturning the screw 2.6 .home by meansvof a tool operating upon itsslot26a.

In operation, the wrenchA is readily and easily'adjusted to lit varioussizes of work.l

The thimble 26 provides a means susceptible of receiving the full gripof the hand of the operator and the turning thereof is thus lgreatlyfacilitated and the jaws may thus be brought toI bear against the workwith.`

the proper degree of force. Moreover, all ofthe parts are readilyaccessible for purposes of lubrication and repair; The thimble may beeasily removed or the sections of the shank of thev innerV jaw may beeasily disassociated for purposes either of lubricas tion o-r of repair.

I claim the motion of the screw tothe innerja'w and releasably couplingthe sections thereof including a spindle secured to the travellingscrew, a head rotatably engaged in the complementary recessesfand a neckconnecting said head and said spindle, a thimble; rota tably carried bythe tubular shank and connecting means between said thimble andV said ftravelling screw.

2.v Ina wrench o-f the character described,

coacting jaws, shanks carried by said jaws' and telescoping'within veachother, one of,l

said Shanks comprising sectionsfhaving'coin-V plementaryrecessesandoperatingmeans for saidjaws including a threaded' bearing carried by oneof said Shanks, a travelling screw coacting with said bearing, commonmeans for transmittingmotion of said screw to' said jaws and couplingthe sectionsginclud-g ing a spindle securedto the screw, a headroitatably engaged in the recess and a'neck connecting the head andthespindle, [a4 rotatable thimble and connecting means Vbetween theV ithimble and the Vtravelling screw.' f

3. In a. wrench of the character described, coacting jaws, shankscarried'by saidjaws and telescoping within each other, one of saidshanks comprising sections having cem-V pleinentary recesses andoperating means forV said jaws including a threaded bearing carried byone of said shanks, a travelling screw i ic coacting with said bearing,common means for transmitting the motion of said screw-t0 said jaws andcouplingthe sections including a spindle secured to the screw, aheadrotatably engaged inthe recess and aV neck connecting the head and 'thespindle Y 4l. VIn a wrench ofY the character described,

coacting jaws, a tubularV shank connected` y withone of said'jaws, asecondshank connected with the otherV of said jaws andoperfy means v forsaidl jaws Ycomprising aV threaded vating in. Said' tubularL shank andoperating Y* ist n 70Vv 1. In a wrench, a body portion, Van outer fincluding a threaded bearing carried by one of said Shanks, a rotatabletravelling screw 10 coacting with said bearing and common means fortransmitting only the rectilinear motion of said screw to said jaws andcoupling the sections of the shank.

JOHN ARTHUR JOHNSON.

